C#

Fudge Mutator wrote:

Does an if statement with a single condition take up more cpu time than an assignment statement?

static void CheckAndMakeEqual(ref string myString1, ref string myString2)
{
    if (myString1 != myString2)
        myString1 = myString2;
}

static void JustMakeEqual(ref string myString1, ref string myString2)
 {
         myString1 = myString2;
 }

After 100,000,000 iterations,<br />
CheckAndMakeEqual() ran in 0.4808 seconds;<br />
JustMakeEqual() ran in 0.1180 seconds.

using System;
using System.Diagnostics;

class Program
{
    static void CheckAndMakeEqual(ref string myString1, ref string myString2)
    {
        if (myString1 != myString2)
            myString1 = myString2;
    }

    static void JustMakeEqual(ref string myString1, ref string myString2)
    {
            myString1 = myString2;
    }

    static void Main(string[] args)
    {
        const int RepeatCount = 100000000;
        string myString1 = "This";  // Two strings, already equal
        string myString2 = "This";

        // Start the timer.
        Console.WriteLine("Testing CheckAndMakeEqual() {0} times. Timer started...", RepeatCount);
        Stopwatch timer = Stopwatch.StartNew();

        // Run the test many times.
        for (int i = 0; i < RepeatCount; i++)
        {
            CheckAndMakeEqual(ref myString1, ref myString2);   // Test the first method.
        }

        // Stop the timer.
        timer.Stop();
        Console.WriteLine("Timer stopped. Execution Time: {0} seconds.", timer.Elapsed.ToString());

        // Start the timer.
        Console.WriteLine("\nTesting JustMakeEqual() {0} times. Timer started...", RepeatCount);
        timer = Stopwatch.StartNew();

        // Run the test many times.
        for (int i = 0; i < RepeatCount; i++)
        {
            JustMakeEqual(ref myString1, ref myString2);       // Test the second method.
        }

        // Stop the timer.
        timer.Stop();
        Console.WriteLine("Timer stopped. Execution Time: {0} seconds.", timer.Elapsed.ToString());
    }
}

Fudge Mutator wrote:

have been here for 10 years

private bool Draged = false;
private int clickOffsetX;
private int clickOffsetY;

private void Sensor_MouseDown(object sender, MouseEventArgs e)
{
    if (e.Button == MouseButtons.Left)
    {
        this.Draged = true;
        clickOffsetX = e.X;
        clickOffsetY = e.Y;
    }
}

private void Sensor_MouseMove(object sender, MouseEventArgs e)
{
    if (this.Draged && e.Button.Equals(MouseButtons.Left))
    {
        this.Left += e.X - this.clickOffsetX;
        this.Top += e.Y - this.clickOffsetY;

    }
}

private void Form2_MouseDown(object sender, MouseEventArgs e)
{
    Button button1 = new System.Windows.Forms.Button();
    this.SuspendLayout();
    this.Controls.Add(button1);
    button1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.button1_MouseMove);
    this.Capture = false; //Force the form to Release the Mouse!
    this.ResumeLayout(false);
}